Introduce runtime function %OptimizeFunctionOnNextCall to manually trigger optimization.

test/mjsunit/compiler/optimized-function-calls.js

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-// Flags: --expose-gc
+// Flags: --allow-natives-syntax --expose-gc
 
 function f() {
   gc();
   return 87;
 }
 
 
 var x = 42, y = 99;
 function g() {
   return x | f() | (y | (x | (f() | x)));
 }
 f();  // Give us a chance to optimize f.
 assertEquals(42 | 87 | 99, g());
 
 
 // Regression test for issue where we would try do an illegal
 // compile-time lookup on a null prototype.
 var object = { f: function() { return 42; }, x: 42 };
 delete object.x;
 function call_f(o) {
   return o.f();
 }
-for (var i = 0; i < 10000000; i++) call_f(object);
+for (var i = 0; i < 5; i++) call_f(object);
+%OptimizeFunctionOnNextCall(call_f);
+call_f(object);
 
 
 // Check that nested global function calls work.
 function f0() {
   return 42;
 }
 
 function f1(a) {
   return a;
 }
 
 function f2(a, b) {
   return a * b;
 }
 
 function f3(a, b, c) {
   return a + b - c;
 }
 
 function f4(a, b, c, d) {
   return a * b + c - d;
 }
 
 function nested() {
   return f4(f3(f2(f1(f0()),f0()),f1(f0()),f0()),f2(f1(f0()),f0()),f1(f0()),f0())
     + f4(f0(),f1(f0()),f2(f1(f0()),f0()),f3(f2(f1(f0()),f0()),f1(f0()),f0()));
 }
 assertEquals(3113460, nested());